[snarks_when_bored]

I would say two things to your reasonable point about the discovery of new species: (1) all of the examples you cite are macroscopic, not microscopic—macroscopic examplars of species are much less numerous, and so are much more easily overlooked, than microscopic ones, which tend to exist in truly stupendous numbers; (2) a microscope will still show the existence of structure, no matter whether that structure has previously been classified or not, so I still wonder why it is that the structures that make up this "weird life" haven't been seen under microscopes. Again, where does it live? I guess you could say it might live in a tiny fissure on the floor of the Mariana Trench or someplace like that, and I'd certainly agree that that's possible. But likely? I don't think I'd go that far.

[SonOfDarkSkies]

One thought I had about microscopic life is that many new life forms (like the eye-lash mites) were discovered by the electron microscope.

I wonder how many new species and organisms will be discovered now that portable/lightweight electron microscopes are being developed for field use?

[gleeaikin]

Aren’t they making new microscopic discoveries at hydrothermal vents and other thermic areas. Also, I seem to recall the discovery of some really unusually anaerobic bacteria deep in rocks. I think I remember some studies being made of life forms in the Sargasso Sea. As was mentioned, Antarctica, especially on land and sea still has a lot to be discovered.